import java.util.Scanner;

public class HomeWork18 {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.print("请输入成绩；");
        int num = s.nextInt();
        if (num >= 90) {
            System.out.println("你的成绩是优秀");

        } else if (num >= 80 && num < 90) {
            System.out.println("你的成绩是良好");
        } else if (num >= 60) {
            System.out.println("你的成绩是及格");
        } else {
            System.out.println("你的成绩是不及格");
        }
    }
}

